Saw-sharpener.



P. HILSINGER. SAW SHARBEN-ER. APPLICATION FILED MAR. 18,1913.

Patented May 5, 1914.

2 SHEETS-SHEET 1.

INVENTOH A TTOR/VE Y 8 P. HILSINGER.

SAW SHARPENER.

APPLICATION FILED MAR. 1a, 1913.

Patented May 5, 191% 2 SHEETSSHEET 2.

ATTORNEYS COLUMBIA PLANOGRAPH C0. WASHINGTON. D. :4

non.

. PUTN-AM HILSINGER, OF KILLAWOG, NEW YORK.

SAW-SHARPENER.

1 '0 all whom it may concern:

Be it known that I, PUTNAM HILsINeER, a citizen of the United States ofAmerica, and a resident of Killawog, in the county of Broome and Stateof New York, have made certain new and useful Improvements inSaw-Sharpeners, of which the following isa specification.

My invention relates to saw Sharpeners, my more particular purpose beingto provide an improved device of this kind in which the handling of thesaw is greatly facilitated,- and in which the placing of the saw teeth,for the purpose of operating upon the same, is rendered speciallyaccurate.

My invention further comprehends various improvements in theconstruction of saw sharpeners for the purpose of increasing theeificiency thereof without unduly complicating the mechanism employed.

Reference is made to the accompanying drawings forming a part of thisspecification, and in which like letters indicate like parts.

Figure 1 is a perspective showing my device completed. Fig. 2 is alongitudinal section through the same upon the line 22 of Fig. 7 lookingin the direction of the arrow. Fig. 3 is a cross section on the line 33of Fig. 2 looking in the direction of the arrow. Fig. 4 is a crosssection on the line 1- 1 of Fig. 2 looking in the direction of thearrow. Fig. 5 is a detail showing in elevation how the teeth of the saware brought into predetermined positions in order to be sharpened upontheir front or cutting edges. Fig. 6 is a detail showing in fragmentaryperspective how the teeth are brought into position to enable them to befiled upon their outer surfaces. so as to form the points upon them.Fig. 7 is a fragmentary plan showing how the setting mechanism is used.Fig. 8 is a view partly in plan and partly in section, showing theclamping mechanism for holding the saw in order to sharpen the latter.

A II1ELSS118 board 9 is provided with a slot 10 and forms practicallythe framework of the device. A clamping bar 11 having the same thicknessas the board 9 is provided with a bevel 12 and is movable relatively tothe board 9. A bar 13 is mortised into one end of the board 9 and theadjacent end of the bar 11. A bolt 14 extends through the bar 11 andadjacent portion of the bar 13,

Specification of Letters Patent.

Application filed March 18, 1913.

' Patented May 5, 191a.

Serial No. 755,091.

the bolt 14 thus constituting a pin upon which the bar 11 is journaledand adapted to swing. The bar 11 and the board 9 are together cut awayso as to form a slot 10*, so that when the bar 11 is forced against thesaw, as hereinafter described, the portion of the saw within the slot 10is not gripped.

' Bolts 15 extend through the bar 13 and adjacent portions of the board9 so as to hold the bar 13 fixedly in relation to the board 9.

A strip 16 of spring metal is provided with a portion 17, this portionbeing bentto an angle with the adjacent portion of the strip 16, andalso slightly curved as inclicated in Fig. 8. A fastening 18 which inthis instance is a screw, secures the portion 17 to the board 9. Thestrip 16 normally tends to stand slightly away from the adjacent end ofthe board 9, as indicated by dotted lines in Fig. 8. The strip 16 isprovided with a bent portion 16 Secured to the latter is a hinge member19. Another hinge member is shown at 20, these two hinge members beingconnected and together constituting a hinge. Secured rigidly to thehinge member 20 is a hand lever 21, the latter being provided with abent portion 22, which is hinged to a plate 28, this plate being securedrigidly to the adjacent edge of the bar 11. \Vhenever the hand lever 21is turned slightly in a clockwise direction according to Fig. 8, asindicated by dotted lines in said figure, the strip 16 is at firstpulled endwise by virtue of the toggle like action of the portion 22 ofthe hand lever, and then the portion 16, because of its tendency toresume its normal position indicated by dotted lines in Fig. 8, movesthe hand lever 21 still farther in the same direction of rotation. Inother words, after the hand lever 21 is rocked a certain distance awayfrom the bar 11, the hand lever springs into the position indicated bydotted lines in Fig. 8. When however, the hand lever is pressed backtoward the bar 11 so as to approach the bar 11, the hand lever suddenlysprings against the bar. The tension of the strip 16 therefore, has atendency to press the bar 11 against the plate 9' or hold the bar 11away from the plate 9, according to the position of the hand lever 21.

A plate 24 is secured upon the board 9 by aid of screws 25. Two bearingmembers 26, each'being substantially semi-cylindrical in generaloutline, extend through the board 9 and between these bearing members islocated a post 27, the inner surfaces of the bearing members havingsuitable conformity to fit the surface of said post, which in thisinstance is rectangular in cross section. The post 27 is provided withgraduations 27 these graduations being employed for facilitating theadjustment of the post for saws of different diameters. The upper end ofthe post 27 is provided with a head 28 and extending from this head is apin 29 upon which the saw may be fitted, as indicated in Fig.

The post 27 at its lower end. is provided with a head 30, and extendingfrom the lat ter is a pin 30"*. A saw may be mounted upon this pin ifthe post 27 be lowered sufiiciently for the purpose, as indicated inFig. 6. A set screw 9 extends through a portion of the board 9 and intoengagement with one of the bearing members 26.

In order to adjust the post 27, the screw 9 is loosened, the post israised or lowered as desired (the graduations 27 being employed tofacilitate this object if desired) and the screw 9 is then tightened tohold the post 27 securely in position.

Mounted upon the board 9 and spaced slightly above the same by a spacingwasher 9 is a filing plate 31, made of metal and provided with a tongue32 integral with the plate and bent slightly downward from its generalplane, as indicated in Fig. 1.

The plate 31 is provided with a slot 33, through which extends a screw34, the latter also extending through the spacing washer 9 and into theadjacent surface of the board The plate 31 may be swung slightly uponthe screw 34 as a center, so that the tongue 32 rests upon the uppersurface of the plate 24. The plate 31 may also occupy the positionindicated in Fig. 1, one edge of the tongue 32 being lodged against theadjacent edge of the plate 24.

A circular saw to be sharpened is shown at 36 and is provided with teeth37, each tooth having front or cutting edge 33 and an outer idle edge39. Both of these edges must be operated upon in order to properlysharpen the tooth.

A collar 40 is fitted upon the pin 29 or 30, as the case may be, for thepurpose of securing and retaining the saw upon the pin upon which it ismounted.

The operation of the saw sharpening mechanism is as follows :-The post27 is adjusted as above described relatively to the board 9, so that thepin 29 will be at a suitable elevation above the board commensurate withthe radius of the saw, which of course varies. This being done, theplate 31 is adjusted so that when one of the saw teeth rests upon thetongue 32, as indicated in Fig. 5, this tooth is in suitable positionfor a file to be applied to it in order to sharpen it by hand. The handlever 21 is now forced toward the bar 11 and this bar is thus clampedtightly against the saw, which rests against the adjacent portion of theboard 9. After the tooth resting upon the tongue 32 is sharpened, thehand lever 21 is swung outwardly away from the bar 11that is, turned ina clockwise direction according to Fig. 8-so that the saw is no longerheld by the bar 11. The saw is now turned by hand upon the pin 29 as acenter, so that the next successive tooth 37 is brought into position.To facilitate the accomplishment of this purpose the plate 31 is swungupon the screw 34 as a center so that the tongue 32 rests upon the plate24 and is, for the moment, out of the way. The plate 31 being replacedso that the tongue 32 engages the under side of the next tooth to besharpened, as indicated in Fig, 5, the file is applied by hand to thetooth in question. The process is continued until each tooth in the sawhas been treated as described; that is, sharpened upon its forward orcutting edge. lever 21 being swung outwardly or away from the bar 11,the saw is removed from the pin 29 and placed upon the pin 30. The plate31 is now swung, upon the screw The 34, as a center, into such positionthat the tends about a quarter of an inch above the upper surface of theplate 31. The screw 9 is then tightened so as to clamp the post 27rigidly in position. The plate 31 is next moved in the general directionof its length so as to engage the tooth immediately adjacent to it, thetop of this tooth being brought up flush with the top of the plate 31,as indicated in Fig. 6. The screw 34 is now tightened and the toothengaging the tongue 32 is dressed upon its outer edge.

I will now describe the saw setting mechanism, which is shown moreparticularly in Figs. 1, 7 and 8. A head 41 having generally the form ofa disk, is provided with a boss 42 extending upwardly from it, and isfurther provided with a rib 43 which neatly within the slot 10. The head41 is also provided with a bolt 44 integral with it and extendingdownwardly through the slot 10, as indicated more particularly in a thelatter is a solid cylindrical block 48 provided at its upper end with ahard disk-like portion 49 constituting an anvil.

Two brackets 50, 51, are integrally mounted upon a single base 50 theseparts preferably being cast. Two setting tools 52, 53, are pivotallymounted within the brackets 50, 51, and are adapted to extend radiallytoward the center of the anvil 49. Beneath each setting tool 52, 53 is aleaf spring 53 which tends to keep the setting tool raised slightlyabove the surface of the anvil. 'lVhen either setting tool is struck bya hammer, it is driven downwardly toward or against the anvil 49, afterwhich it resumes its normal position, due to action of the springbeneath it. A saw to be set is shown at 54 and is provided with teeth55.

The saw 54 is fitted upon the boss 42 as a center, and the head 41 isadjusted, as above described, so that the teeth of the saw rest upon theanvil 49. As the teeth of the saw are inclined to two differentanglesthat is to say, as some of the teeth are right handed and othersare left handed-one of the setting tools 52, 53 is employed for settinghalf of the teeth, and the other used for setting the other half of theteeth. In practice, therefore, I throw one of the setting tools 52, 53backwardly and out of the way until the other setting tool is used upononehalf of the teeth. I then take the saw off of the boss 42, turn itover, and place it back upon the boss 42, after which I turn it tooth bytooth, setting the various teeth by aid of the setting tool which wasnot used in con nection with the saw before it was turned over.

For the work of setting, I simply strike the setting tool 52 or 53, witha hammer one time for each tooth. If desired, however, the setting toolmay be struck more than once.

I do not limit myself to the precise construction shown, the scope of myinvention being commensurate with my claims.

I claim 1. A saw sharpener comprising a frame, a bar journaled to saidframe and adapted to swing relatively thereto in the same planetherewith, a clamping mechanism connected to said frame and to one endof the bar for forcing said bar toward said frame in order to clamp asaw against the same, and means for supporting the saw in position to beclamped against said frame.

2. In a saw sharpener, the combination of a board provided with a hole,a bearing located within said hole, said bearing com- Copies of thispatent may be obtained for prising a pair of oppositely disposedseparate pieces having their opposing edges recessed, a post extendingbetween the bearing pieces and in the recesses, and a set screwextending through a portion of said board and engaging one of saidpieces for the purpose of clamping said pieces together on both sides ofth post, means for revolubly supporting a saw upon said post, andmechanism coacting with said board for clamping said saw.

3. A device of the class described comprising a board, a saw supportingpost adjustably mounted relative to the board, and a filing plateadjustably mounted relative to the post and board, said plate having asaw tooth engaging and limiting portion.

4. A saw sharpener comprising a board, a post supported thereby andmovable relatively thereto, said post carrying at its opposite endsmeans for engaging a saw, a bar located adjacent said board and adaptedto press said saw against the edge of said board, and clamping mechanismconnected with said board and with said bar for forcing said bar towardsaid board.

5. A saw sharpener comprising a frame, a post mounted upon said frameand adjust able relatively thereto, said post extending above and belowsaid frame and being provided with a plurality of supporting memberseach adapted for holding a saw, clamping mechanism connected with saidboard and co-acting therewith for securing a saw rigidly in engagementwith said board, and a filing plate mounted upon said board.

6. A saw sharpener comprising a board, a post adjustable relativelythereto and pro vided with means for engaging a saw at a point adjacentthe middle of said board, a bar movable relatively to said board, meansfor forcing said bar toward said board in order to clamp said sawrigidly in relation to said board, a filing plate mounted upon saidboard and provided with a portion against which a saw tooth may beplaced, and means for adjusting the position of said filing platerelatively to said board.

7. A device of the class described comprising a board, a post adjustablewith relation thereto, and a filing plate adjustable with relation tothe board and in a plane parallel with the adjusting plane of the post.

PUTNAM HILSINGER.

Witnesses:

M. E. MEAD, N. J. BRIGHAM.

five cents each, by addressing the Commissioner of Patents, "Washington,D. C.

